Upon contraction, the smallest motor unit, that is, the one associated with the fewest muscle fibers, is the normally the first activated. As the contraction progresses, larger motor units are brought into play.Efficient muscle contraction depends on the motor units within a muscle working effectively together.pon contraction, the smallest motor unit, that is, the one associated with the fewest muscle fibers, is the normally the first activated. As the contraction progresses, larger motor units are brought into play.
Trojan programs are most dangerous because they can create a back door. into your computer that gives malicious hackers direct access to your. system. Once installed, Trojans can hijack your PC and upload usernames, passwords, credit card numbers, social security numbers, and bank account.
Definition of: scareware scareware A warning message that pops up from a website that claims the user's computer is currently contaminated or not running properly. Also called fake antivirus and rogue antivirus, scareware is a dishonest attempt to cause a user to purchase antivirus, registry cleaner or some other software that repairs problems or enhances performance. Worse yet, scareware may be used to entice the user to install phony software that implants a real virus or some other malware. In either case, the dire warning frightens people into taking action. See ransomware, spyware and wares.